1. What is Glutathione?

Ans: Glutathione is a powerful antioxidant that fades pigmentation and brightens skin tone. Its topical application also helps with cellular repair and regeneration for your skin.

2. Why do you need Vitamin C and Glutathione together in one serum?

Ans: Vitamin C and Glutathione are two of the most studied brightening antioxidants in skincare, but what makes them genuinely powerful is how they amplify each other.Vitamin C works by inhibiting the enzyme tyrosinase, which is responsible for melanin production. This directly reduces the formation of dark spots and pigmentation. Glutathione works through a complementary but different pathway, it shifts melanin synthesis away from darker eumelanin toward lighter phaeomelanin, and simultaneously neutralises free radicals that contribute to uneven skin tone.When used together, they target pigmentation from two angles at the same time, which is why the combination delivers faster, more visible brightening than either ingredient alone. Glutathione also helps regenerate and extend the activity of Vitamin C in the skin, meaning your Vitamin C keeps working longer. The result is a formula that does not just brighten, it maintains that brightness.

3. Why does Foxtale use Ethyl Ascorbic Acid (EAA) in this serum instead of pure Vitamin C?

Ans: In our 15% Vitamin C Serum, we use pure L-Ascorbic Acid, the most potent and direct form of Vitamin C. For the Vit C-Gluta Advanced Brightening Serum, we use Ethyl Ascorbic Acid (3-O-Ethyl Ascorbic Acid) for a specific formulation reason: compatibility with Glutathione.Pure L-Ascorbic Acid requires a very low pH (2.5–3.5) to remain stable and effective. Glutathione, however, is most effective at a near-neutral pH. Combining both in the same formula at L-Ascorbic Acid's required pH would compromise the Glutathione's efficacy.Ethyl Ascorbic Acid (EAA) is a stable Vitamin C derivative that remains effective across a wider pH range, which allows both actives to coexist in one formula without either being weakened. EAA is also soluble in both water and oil, enabling it to penetrate the skin more effectively. Once absorbed, EAA is converted into pure Vitamin C inside the skin, delivering the same core benefits, brightening, collagen support, and dark spot reduction, while remaining gentle enough for daily use alongside Glutathione.

4. What skin concerns does this serum specifically target?

Ans: The serum is designed to work on eight interconnected skin concerns:1. Dullness: restores radiance by neutralizing oxidative stress2. Dark spots: from sun exposure or post-acne marks3. Pigmentation: reduces existing melanin deposits4. Melasma: targets stubborn hormonal pigmentation5. Uneven skin tone: evens out patchy, discoloured areas6. Dehydration: hydration boosters support a plump, dewy appearance7. Early signs of ageing: antioxidant protection prevents collagen breakdown8. Boost glow: long-term use helps maintain baseline radiance

5. How quickly will I see results with this 10% Vitamin C + Glutathione serum?

Most users notice a visible improvement in brightness and overall glow within 3 days of consistent use. This early result is driven by Vitamin C's antioxidant action, which quickly addresses oxidative dullness caused by pollution and UV exposure.Deeper results, reduction in dark spots, pigmentation, and melasma, are typically noticeable after 4 to 6 weeks of daily morning and night use.Consistency is the single most important factor. Always follow with a broad-spectrum SPF 50 Sunscreen or higher during the day, since UV exposure directly counteracts the depigmenting effects of both Vitamin C and Glutathione.

6. Is this serum suitable for oily, dry, and sensitive skin?

Ans: Yes. The lightweight gel-cream texture is specifically designed to be breakout-safe and suitable for all skin types.1. Oily and acne-prone skin: Non-comedogenic base absorbs quickly without clogging pores.2. Dry skin: Hydration boosters deliver moisture alongside brightening actives.3. Sensitive skin: Ethyl Ascorbic Acid is gentler than pure L-Ascorbic Acid and is less likely to cause tingling or redness.A patch test is still recommended if you have reactive skin, apply a small amount on the inner arm and wait 24 hours before full facial application.

7. Can I use this serum alongside niacinamide or retinol?

Ans: Niacinamide can be safely layered with this serum. The combination of Vitamin C, Glutathione, and niacinamide provides a complementary brightening effect, each working on a different step of the melanin production pathway.Retinol should be used separately. Use the Foxtale Vitamin C-Glutathione Serum in the morning (followed by SPF), and apply retinol at night. Combining retinol and Vitamin C derivatives in the same step can cause irritation and reduce the efficacy of each active.Avoid using alongside AHA/BHA exfoliants in the same step. If you use an exfoliating toner or acid serum, apply it at a different time of day.

8. Does Glutathione in skincare actually work for skin brightening?

Ans: Yes, topical Glutathione has clinical evidence supporting its role in skin brightening. It works through two mechanisms:1. It inhibits tyrosinase activity (the same enzyme Vitamin C targets), reducing new melanin formation.2. It shifts the type of melanin produced, from darker eumelanin to lighter phaeomelanin, leading to overall brightening of skin tone over time.3. Glutathione is also known as the body's "master antioxidant" because it helps regenerate other antioxidants, including Vitamin C. This is why the Vitamin C + Glutathione combination delivers compounding brightening results, they reinforce each other's mechanisms rather than working in isolation.

9. How should I store this serum and what does it mean if it changes colour?

Ans: Store the Vitamin c - Glutathione serum in a cool, dry place away from direct sunlight and heat. Both Vitamin C and Glutathione are sensitive to light and air exposure.A slight yellowing of the formula over time is normal and does not indicate the product is unsafe. However, if the serum turns a deep orange or brown, the Vitamin C component has begun to oxidise and potency may be reduced.Always close the cap tightly after use. A bathroom with high humidity can accelerate oxidation, a bedside drawer or cabinet is preferable for storage.

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★4.9

10% Vit C-Gluta Advanced Brightening Serum

Brightens skin in 8 ways to reveal an eternal glow | 30 ml

₹645

₹548

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Introducing a first-of-its-kind serum that brightens skin in 8 ways. Powered by Glutathione and Vitamin C, it works in 8 targeted ways: brightens, clears, fades pigmentation, evens tone, fights melasma, hydrates, prevents ageing and boosts glow. Trust it to visibly brighten your skin in just 3 days and unlock your Eternal Glow. Its lightweight, breakout-safe gel-cream texture suits all skin types and delivers instant results without irritation.

Product Details

Helps With

Hero Ingredients

10% Vit C-Gluta Complex

Hydration Boosters

10% Vit C-Gluta Complex Helps with fading melasma, dark spots and skin brightening

Hydration Boosters Hydrates skin for a plump and dewy look.

For

All Skin Types

Routine

Daily, morning and night 

offers

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APPLIED

10% Vit C-Gluta Advanced Brightening Serum

All About 10% Vit C-Gluta Advanced Brightening Serum

Expected Results

Your skin looks glowing.

Slide to see expected results

Day 1

Day 3

Day 21

How to use

Complete Your Routine

Step 1. Cleanse

Super Glow Face Wash

₹ 249|100 ml

Step 1. Cleanse

Super Glow Face Wash

₹ 249|100 ml

Step 2. Treat

10% Vit C-Gluta Advanced Brightening Serum

₹ 645|30 ml

Step 2. Treat

10% Vit C-Gluta Advanced Brightening Serum

₹ 645|30 ml

Step 3. Moisturize

Super Glow Moisturizer with Vitamin C

₹ 445|50 ml

Step 3. Moisturize

Super Glow Moisturizer with Vitamin C

₹ 445|50 ml

Step 4. Protect

Glow sunscreen SPF 50, In-Vivo Tested with PA++++

₹ 349|50 ml

Step 4. Protect

Glow sunscreen SPF 50, In-Vivo Tested with PA++++

₹ 349|50 ml

Directions of use

How to Use:

Cleanse your face and apply a pea-sized amount evenly.
Gently pat the serum into your skin until fully absorbed.

Note: Patch test prior to use is advised

When to Use:

Can be used daily, in the morning and at night

Full Ingredient List

Aqua, 3-O- Ethyl ascorbic acid, Propanediol, Propylene glycol, Betaine, Glycerin, Glyceryl Glucoside, Glutathione, Phenoxyethanol, Squalane, Sodium Acrylates Copolymer, Lecithin, Undecylenoyl Phenylalanine, Allantoin, Tocopherol, Carbomer, Ethylhexylglycerin, Octenidine HCl, Disodium EDTA, Triethanolamine, Allergen free fragrance

Full Ingredient List

Our 10% Vit C – Gluta Advanced Brightening Serum is

Vegan

Paraben Free

Dermatologically Tested

Cruelty Free

Sulfate Free

Reviews

4.9

★★★★★★★★★★

46 REVIEWS

Komal P.

★★★★★★★★★★

2 days ago

Perfect choice

Awesome glow

Suhana S.

★★★★★★★★★★

6 days ago

Highly recommended

Nancy J.

★★★★★★★★★★

2 weeks ago

Excellent product

Best product for glowing skin

Kusumgrover ..

★★★★★★★★★★

2 weeks ago

This serum is advanced technology brightening serum

Serum to badiya hai baki use karke dekhte hai kitna effective hai

10% Vit C-Gluta Advanced Brightening Serum

All About 10% Vit C-Gluta Advanced Brightening Serum

Expected Results

Complete Your Routine

Directions of use

How to Use:

When to Use:

Full Ingredient List

Full Ingredient List

Our 10% Vit C – Gluta Advanced Brightening Serum is

FAQs

Additional Information